______ time went by, Cindy and the other kids became good friends.
Staying up late _____ our health. We should go to bed early and get up early.A. is good forB. is useful forC. is harmful to
We should _____ the rubbish when we go travelling. A. take off B. turn off C. take away
I must ask my father to give up _____ . It’s bad for his health. A. smoke B. smoking C. to smoke
Columbus ______ America in 1492. But he didn’t explore it. A. looked for B. found out C. discovered
—Jim, get up right now, _____ you will be late for school. —OK. Mom. A. and B. or C. But